Thompsonville, MI 49683 Frost Dates
Frost dates for Thompsonville, MI, ZIP 49683
The last spring frost here typically falls around 05/07, about 252 days from today. The first fall frost typically arrives around 10/20, about 163 frost-free days later.
Thompsonville sits in USDA Zone 6a (-10 to -5°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
Zone 6a around Thompsonville has about 8 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around Thompsonville's last frost
05/07 is the middle of 30 years of NOAA records, not a promise. Plant by 04/23 and you're betting against frost in roughly 9 years out of 10. 05/25 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Thompsonville compares
Thompsonville's growing season runs about 163 days, ranking 31,511 of 40,283 US ZIP codes measured here, longest to shortest. Within MI, it ranks 522 of 1,153.
Learn more
local microclimates explains what one yard in Thompsonville can differ from the 49683 normal, and zone vs. frost date explains why Zone 6a and Thompsonville's frost date answer different questions.